Conference Tables in History (and myth)

The famed Arthurian Round Table was not mentioned in writing until 1155, centuries after King Arthur's reign, and may be more legend than historical reality. Yet for over 800 years it has been a powerful symbol of the chivalric ideal. Legend has the Round Table able to seat 150 knights -- a conference table that massive would be a feat of engineering even today.

Was the Round Table real or a myth? Does it matter? The idea of the noblest knights gathered around the table in fellowship captures our imagination either way.